http://www.aerospaceweb.org/question...cs/q0165.shtml
If that is a serious question you NEED to read the page on the link above.
Another key angle that is most often confused with angle of attack is called the aircraft pitch angle. Pitch angle is one of three angles that are called Euler angles. These three angles define the orientation of the aircraft in roll, pitch, and yaw with respect to a fixed reference coordinate system
Some further examples are also provided illustrating the key differences between these two important angles. The first set of examples shows three airfoils all at the same angle of attack but at different pitch angles. This situation demonstrates that a wing can easily be at the same angle of attack even when flying much different maneuvers, such as climbing or descending through a loop.